having worked for a while at the Shell plant in Ellesmere Port, I can inform you that all the leading supermarkets, ie, ASDA, TESCO, MORRISONS etc all use the same fuel from the same source. (SHELL)
It always makes me smile when someone says that a supermarket etc is better than another or vice versa, as it all comes from the same source!

just a bit of info for you all next time you fill up, if you fill up at a local (non-national) petrol station, just ask them where the fuel comes from and when they say they dont know, you can tell them, it more than likely comes from Shell!

having worked for a while at the Shell plant in Ellesmere Port, I can inform you that all the leading supermarkets, ie, ASDA, TESCO, MORRISONS etc all use the same fuel from the same source. (SHELL)
It always makes me smile when someone says that a supermarket etc is better than another or vice versa, as it all comes from the same source!

just a bit of info for you all next time you fill up, if you fill up at a local (non-national) petrol station, just ask them where the fuel comes from and when they say they dont know, you can tell them, it more than likely comes from Shell!

having worked for a while at the Shell plant in Ellesmere Port, I can inform you that all the leading supermarkets, ie, ASDA, TESCO, MORRISONS etc all use the same fuel from the same source. (SHELL)
It always makes me smile when someone says that a supermarket etc is better than another or vice versa, as it all comes from the same source!

just a bit of info for you all next time you fill up, if you fill up at a local (non-national) petrol station, just ask them where the fuel comes from and when they say they dont know, you can tell them, it more than likely comes from Shell!

**This I know. However I also know that over a test period 5 years and several hundred tanks of fuel I can tell you that, on average, I get 22% worse fuel economy with Tesco 95 than with Shell 95. Though for proper, accurate numbers I should really change the fuel filter between each type of fuel I was testing, 20% is a big enough difference to be noticeable and significant. This was after a run through of five full tanks before taking 3 measurement tanks, and the measurement tanks were all on the same route:

(I never test the supers - no point in a V6 MX-3. The Accord uses Super, but we only ever get it from one garage :lol: )

And that's to say nothing of the silicate problem that only affected Tesco garages. This was eventually traced to a distribution centre in the south-east which only supplies…. supermarket crap (site used by Asda, Tesco and Morrisons).

The refineries may all supply the same stuff, but it passes through a few intermediate processes before it ends up in the tank.**

Research Octane Number is a laboratory measure of fuel detonation resistance (in equivalence to pure isoctane - 95RON is equivalent to a 95% isooctane/5% heptane mixture). Australia and all of Europe have this on their pumps.

Motor Octane Number is a measure of fuel detonation resistance under load. Slightly more useful than RON, but not put on fuel pumps anywhere in the world that I know of. It's usually 8-10pt lower than the same fuel's RON figure - 95RON is about 85-87MON.

Pump Octane Number is the average of those two - (RON+MON)/2 - and is what is displayed on American fuel pumps. Because MON is usually 8-10pt lower than RON, PON is usually 4-5pt lower - so 95RON would be 85-87MON and 90-91PON. PON can also be called AKI - Anti-Knock Index.

So Estonia should be using the same standards that the rest of Europe, including Russia and former states of the USSR, use. 110RON is… well... propane, frankly.**

architect - you can get 102RON stuff at the pumps in the UK, but only at certain BP filling stations. Can't imagine my car needing it just to start...

Besides, high-RON just means a more stable fuel, less prone to preignition. You should always run the lowest octane fuel you can get that doesn't result in preignition (knock or ping), because otherwise you just end up running rich the whole time, pissing money out the exhaust.**

I have managed from southampton to dublin on one tank and that was around 340 miles, it depends on driving style, motorways, other traffic etc, I did that journey overnight from 8pm to 9am but going to work everyday I get about 150 to a full tank, because its always running cold and its just traffic lights and junctions all the way